This page is about the meanings of the acronym/abbreviation/shorthand ATX in the Business field in general and in the AMEX Symbols terminology in particular.

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Definition

ATX is a motherboard configuration specification developed by Intel in 1995 to improve on previous de facto standards like the AT design.
It was the first major change in desktop computer enclosure, motherboard and power supply design in many years, improving standardization and interchangeability of parts. The specification defines the key mechanical dimensions, mounting point, I/O panel, power and connector interfaces between a computer case, a motherboard and a power supply.
With the improvements it offered, including lower costs, ATX overtook the AT configuration completely as the default design for new systems within a few years.
ATX addressed many of the AT's designs annoyances which had frustrated system builders.
Other standards for smaller boards usually keep the basic rear layout but reduce the size of the board and the number of expansion slots. In 2003, Intel announced the BTX standard, intended as a replacement for ATX.
As of 2009, the ATX design remains a standard for do-it-yourselfers; BTX has however made inroads into pre-made systems.
ATX motherboards were designed to solve the problems in BAT and LPX motherboards.